Multistage liquid elevator



Oct. 18, 1938. P. BERMAN El AL MULTISTAGE LIQUID ELEVATOR Filed May 10,1 93? PH/L/P BEFPMA/v LEUNA/FJB. HARE/5 ATTORNEY I Patented Oct. 18,1938 UNITED STATES- PA ENT- ornca MULTIS'I'AGE LIQUID ELEVATOR l 'hliipHerman, New Bayside, N. Y.,

York. and Leonard B. Harris llllllioll poration, Brooklyn, N. I York toan Pump cora corporation of New Application May 10, 1937. Serial No.141,830

2 Claims.

Another object of this invention is to provide a device in which theliquid being lifted from the well is itself utilized as a pumping agent.

Another object of this invention is to provide a device of the characterdescribed, which is particularly applicable for use with continuousrotary pumps arranged for effecting a continuous flow.

Another object of this invention resides in the particular arrangementand structural features of the cooperating elements.

It is well known that the maximum suction lift of a pump is below thirtyfeet, with the result that asuction pump at the ground level is onlyeffective for a shallow well. In the case of deeper wells it is commonto dispose the pump below the ground level and within its suction liftdistance of the liquid in the well. In accordance with the presentinvention, a continuous flow pump may ground level.

be used for drawing from a well considerably exceeding in depth thesuction lift limit without necessitating a disposal of the pump belowthe Since some of the pumped liquid is itself utilized for effecting thedesired injection of water into the suction pipe, the pump is the onlypart of the devicewhich requires power for its operation and a minimumof pumping equipment is required.

with the above and other objects in view, the invention will behereinafter more particularly described, and the combination andarrangement of parts will be shown in the accompanying drawing andpointed out in the claims which form part of this specification.

Reference will now be had to the drawing, wherein like numerals ofreference designate corresponding parts throughout the several views, inwhich:

Figure l is a view of an installation embodyin the invention.

Figure 2 is a vertical cross-sectional view of a the numeral well inwhich is a high pressure drive line ll connected to a pump dischargepipe of a rotary pump l2. preferably of the centrifugal type and havinga suction pipe I4- Both the discharge and suction pipes lead downwardsinto the well and terminate in a water elevator is.

The water elevator i5 comprises an elongated main body [8 and a pipeconnection I! to which the drive line I I is connected. The body l6forms l0 indicates a well casing ofa deep.

a tubular central portion around which is a circumscribing storagechamber l9. A plurality of nozzles 20, are positioned diametrically ofsaid tubular body It and-in inverted V-shaped form with the apex 36 ofthe V coinciding with the axis of the tubular body.

'The outlet ends of the nozzles 20 terminate in a threaded socket 2|into which has been threaded a combining nozzle 22. The nozzle 22 hasbeen positioned in alinement with the axis of the tubular body It and sothat the said apex is positioned within said nozzle.

A Venturi or compound tube 23 has been secured at the upper end of thetubular body It and in axial alinement therewith. The Venturi tube has aconverging lower portion 24, a diverging upper portion 25, a throat 26and a cylindrical tubular portion 21.

The nozzles 20 substantially join together at their upper ends andjointly discharge into the combining nozzle 22, the outlet of whichterminates closely contiguous to the throat .26 of the Venturi tube 23,leaving an annular gap 28.

The nozzles 20 are of conical converging form so as to increase thevelocity of the water entering the combining nozzle 22. The nozzle 22 isalso of conical converging form to further increase the velocity of thewater passing therethrough. g

The combining nozzle 22 is directed axially through the convergingpassage 24 which passage may be curved and enlarged between-its upperand lower ends, as shown, whereby the flow of the incoming liquid aboutthe nozzle is facilitated.

The water elevator II extends into the water at the lower elevation ofthe well and is provided at its bottom end with a suitable foot valve 30through which 'the water from the well is drawn into the suction pipe I.The discharge from the'pipe l2 takes place under pressure into a tank3|. 7

A regulating valve 32 is provided in the discharge line l2 near the tankII and a pressure gauge 23. is connected at-the upper end of thedischarge pipe I2.

lated water from the water elevator is operative independently of and inaddition to the suction in the pipe H, for drawing water through thefoot valve 30. The amount of water recirculated is controlled byregulating the discharge pressure in the discharge line l2 by means ofthe valve 32. 7

A cup 34 above the pump discharge pipe l2 serves for priming the system.A valve 35 serves to set the water elevator IS in or out of operation. v

In operation, the liquid is pumped downwardly through the drive line Hand upwardly through the successive conical converging nozzles 20 and22. The first stage nozzles 2ll-and the second stage conical convergingnozzle 22 cause the liquid discharge therethrough to be under increasedhigh velocity. The nozzle 22 projects directly into the entrained streamso that the direction of the entrained stream is not changed. Theentrained liquid is given an impulse by the water elevator jet in thesame direction exactly in which it is flowing. The two streams mixwithin the Venturi tube 23 where their resultant velocity head isconverted into pressure head sufiicient to lift the liquid up to thepump l3.

An air volume control 31 controls the air in the tank 3| and a pressureswitch 38 mounted on the tank and connected to the motor automaticallycontrols the operation of the motor 39.

It will thus be seen that there has been provided a multi-stage liquidelevator in which a double or compound impulse efiect is imparted to theliquid and which functions to repeatedly increase the velocity of theliquid and to create a high suction at the throat 26 of the Venturi tube23, which suction can entrain and lift the liquid from a deep well.

We claim:

1. In a pumping mechanism for a deep well,

comprising a pump, a high pressure drive line connected to the pumpdischarge, a multi-stage liquid elevator disposed in said well andconnected to said drive line, said elevator having an elongated tubularcentral body portion, a storage chamber circumscribing said tubular bodyportion, a plurality of conical converging nozzles connected with saidchamber and being posi-' tioned diametrically of said tubular body andin inverted V-shaped form, the apex of said inverted V coinciding withthe axis of said .tubular body portion, an upper conical converging andcombining nozzle in alinement with the axis ofsaid tubular body portionand with said apex positioned within said nozzle, a Venturi tubepositioned at the upper end of said tubular body portion, said uppernozzle being positioned inside the converging portion of said Venturitube with the outlet of said nozzle terminating closely contiguous tothe throat of said Venturi tube, each of said converging nozzles havingan elongated linear body and being designed for increasing the velocityoi a liquid passing therethrough, whereby the velocity of the liquid isrepeatedly increased before entering said Venturi tube and forms a highsuction at the throat of said Venturitube which entrains and lifts thewater from the well, and means in circumscribing relation with saidVenturi tube for connecting said elevator with the pump suction.

2. A multi-stage liquidelevator 01 the class described, comprising atubular body portion, a storage chamber circumscribing said tubularbody, a plurality of conical converging nozzles connected with saidchamber and being positioned diametrically of said tubular body and ininverted V-shaped form, the apex of said inverted V coinciding with theaxis of said tubular body portion, an upper conical converging andcombining nozzle in alinement with the axis of said tubular body portionand with said apex positioned within said nozzle, a Venturi tubepositioned at the upper end of said tubular body portion, said uppernozzle being positioned inside the converging portion of said Venturitube with the outlet of said nozzle terminating closely contiguous tothe throat of said Venturi tube, all of said nozzles being of conicalform, each of said converging nozzles having an elongated linear bodyand being designed for increasing the velocity of a liquid passing'therethrough, means for supplying a liquid to said storage chamber,means in circumscribing coaxial relation with the outlet of said Venturifor discharging the liquid therefrom, the out-flowing liquid being insubmerged relation in said discharge means.

PHILIP BERMAN. LEONARD B. HARRIS.

